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Abstract
Mobile devices such as smartphones are prime candidates for the application of mixing techniques to provide anonymity for small groups of individuals numbering 30 to 40 members. In this work, a Chaum mix inspired, smartphone based network that uses the Short Message Service (SMS) is proposed. This system leverages both techniques used by current anonymity networks as well as knowledge gained from current and past research to make messages private and untraceable. Previously published attacks to anonymous systems are addressed as well as mitigation techniques.
Highlights
Much research has been performed to provide anonymity and secrecy in communication systems
With an understanding of Chaum Mixing, one could deduce that almost any network of devices capable of meeting the constraints defined above could achieve anonymity through an application of the concepts proposed by Chaum and the research inspired by them
The need for anonymity in Short Message Service (SMS) is quantified by the set of threats that it faces
Summary
Much research has been performed to provide anonymity and secrecy in communication systems. Mobile devices are prime candidates for the application of mixing techniques to provide anonymous communication These devices fit the organizational requirements and capabilities of a Chaum-type network. The need for anonymity in SMS is quantified by the set of threats that it faces It is usually difficult for a single attacker to gain access to the contents of a message sent via SMS or to follow the SMS message through the network. Without gaining some sort of access to the mobile device sending the message, the only option left to the attacker is to intercept and decrypt the message by being present on the endpoints of the system where cell towers communicate with end nodes For this reason, SMS is not often considered vulnerable.
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